Figueiredo V L, Sene F de M
Departamento de Biologia FFCLRP-USP, Ribeirão Preto, Brazil.
Rev Bras Biol. 1992 Nov;52(4):555-61.
Analysis of 28 strains of Drosophila buzzatii from six different localities revealed that populations from southern Brazil apparently differ from northeastern populations in chromosome structure. Of the 16 polymorphic chromosome inversions detected in this species, only two (2j and 5c2) were present in southern populations. The Northeastern populations were the first of this species found not to have the 2j inversion. This suggests that the populations of Drosophila buzzatii may have lost chromosome polymorphism during dispersion, supporting the idea that the current geographic distribution of this species in South America is due to active dispersion.
对来自六个不同地区的28株巴氏果蝇的分析表明，巴西南部的种群在染色体结构上显然与东北部的种群不同。在该物种中检测到的16种多态性染色体倒位中，只有两种（2j和5c2）出现在南部种群中。东北部种群是首次发现没有2j倒位的该物种种群。这表明巴氏果蝇种群在扩散过程中可能失去了染色体多态性，支持了该物种目前在南美洲的地理分布是由于主动扩散的观点。
